STAT 200 Quiz 2

UMUC STAT 200 Quiz 2 Earned a grade of 96. Beware of question 31and 33 1. (1) The singular form of the word “dice” is “die”. Tom was throwing a six-sided die. The first time he threw, he got a three; the second time he threw, he got a three again. What’s the probability of getting a three at the third time? 1/6 2. (2) There are 30 table tennis balls in the box: 6 are green, 10 are red, and 14 are yellow. If you shake the box and then randomly select one ball from the box, what’s the probability that you will get a red one: .3333 or 10/30 3. (3) Rachel was flipping a coin with Jerry. She told jerry: “I am able to get all heads in two tosses.” Jerry laughed at her: “No, the probability of getting two heads at two tosses is only ” 1/4 or .25 4. (4) Jennie and Alex both wanted to get a free ticket for a College Music concert. However, the concert staff told them the tickets were limited. Twenty people wanted to attend the concert but only 10 free tickets were left. So the concert center staff decided to use a lottery to decide who would receive the free tickets. What’s the probability of Jennie and Alex both getting free tickets? 10/20* 9/19= 9/38 or 0.2368 5. (5) Laura and Melissa were playing dice. What the probability of Laura and Melissa both getting a 6? 1/36 or 0.0277 6. (6) In a statistics class with 36 students, the professor wanted to know the probability that at least two students share the same birthday. The probability will be a. 0.1 b. Much smaller than 0.1 c. Much bigger than 0.1 d. Not possible